diff --git a/src/security/sec-rule-relative.hpp b/src/security/sec-rule-relative.hpp
new file mode 100644
index 0000000..1d763de
--- /dev/null
+++ b/src/security/sec-rule-relative.hpp
@@ -0,0 +1,58 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/**
+ * Copyright (C) 2013 Regents of the University of California.
+ * @author: Yingdi Yu <yingdi@cs.ucla.edu>
+ * See COPYING for copyright and distribution information.
+ */
+
+
+#ifndef NDN_SEC_RULE_RELATIVE_HPP
+#define NDN_SEC_RULE_RELATIVE_HPP
+
+#include "sec-rule.hpp"
+#include "../util/regex.hpp"
+
+namespace ndn
+{
+  
+class SecRuleRelative : public SecRule
+{
+public:
+  struct Error : public SecRule::Error { Error(const std::string &what) : SecRule::Error(what) {} };
+  
+  SecRuleRelative(const std::string& dataRegex, const std::string& signerRegex, const std::string& op, 
+                  const std::string& dataExpand, const std::string& signerExpand, bool isPositive);
+  
+  virtual
+  ~SecRuleRelative();
+  
+  virtual bool 
+  matchDataName(const Data& data);
+  
+  virtual bool 
+  matchSignerName(const Data& data);
+  
+  virtual bool
+  satisfy(const Data& data);
+  
+  virtual bool
+  satisfy(const Name& dataName, const Name& signerName);
+  
+private:
+  bool 
+  compare(const Name& dataName, const Name& signerName);
+  
+private:
+  const std::string m_dataRegex;
+  const std::string m_signerRegex;
+  const std::string m_op;
+  const std::string m_dataExpand;
+  const std::string m_signerExpand;
+  
+  Regex m_dataNameRegex;
+  Regex m_signerNameRegex;
+};
+
+}//ndn
+
+#endif